Differential-gear casing.



TENTED-JiJNE 19, 1906. A B.P.GRAYV." DIFFERENTIAL GBAR'GASING.

APPLICATION rum JAN. 2, 1904. RENEWED r113. 19. 1906.

T No. 823,524.

UNITE snares PATENT orinon.

annnr r. GRAY, OFCINCINNA'TI, .onro, Assienoa TO GRAY MANU? FAGTURINGCOMPANY or DETROIT, or DETROIT, MICHIGAN, A.

CORPORATION OF'MIOHIGAN.

DIFFERENTIAL-GEAR CASING- U Application filed January Z, 1904-' .To allwhom it mlay concern:

- Be it known thatl, EMMET P. GRAY, a citi-' zen of'the United States,residing at Cincinnati, in the county of Hamilton and State of Oh'id,have invented certain new and useful Improvements in Differential GearCasings,

of which the following is a full, clear, and exact description;referencebeing had to the accompanymg drawings, forming part of thisspecification.

My invention relates to casings or housin s for differential gears, andis particulary Y adapted for use in automobile construction I opened andon an enlarged'scale;

where divided shafts are used and it is essen-' tialthat the same be ket at all times in perfect'alineinent; and it as for itsobject the blewithout disturbing the a justment of the prarts or requiring the removalofthe casing 0m the machine, as is necessary with the casings nowemployed.

The novelty of my invention will be'hereinafter more fully set forth,and specifically pointed out in the claims.

In the accompanying drawings, Figure l is a side elevation of a casinembodyin my invention and shown applied to'a rear ax e for anautomobile; Fig. 2 is a broken sectional elevation of the casing,showing the same'partly Fig. 3 is a broken side elevation similar toFig. 1, show ing'the casing adapted for a bevel-gear drive. Fig. 4 is anend elevation of the tube forming one-half of the casing. Fig;,5 is aside view of the tube, the same being out ready for spreading to theposition shown in Fig. 4.

The same letters of reference are used to indicate identical parts inall the figures.

Heretofore in .differential-gear-case construction the case has beenmade of two cupped disks, which have been either screwed together orflanged a d bolted together at their adjoining faces'a d which have beenprovided with eentralt threaded apertures nto which tubes have beenscrewed and sometimes brazed. These'tubes have their axes coincident,and in them is journaled the shaft carrying the rear wheels. This shaftis usually split or divided a the center of the gear-easing, and the dierential gear em- Specification bf Letters Patent.

Renewed February 19,1908. Serial No. 801,913.

to suit any requirements.

With the above-described -con-. structlon there has always been more orless trouble arisin fromthe difficulty in etting where they are joine tothe two halves of the casing, and in repairing the difierenti'al gearand sometimes even to adjust the bearings of [theshaft it is nearlyalways necessary to remove. the whole casing and its inclosed gearingand shafts entirely from the machine, thus;

entailing a great dea of labor and disturbing of adjustments.- Under myconstruction PatenteoiJune 19, 1906.,

braces and drives these two adjacent ends of the shaft.

this is entirely obviated, and I willnow prop ceed to describe it indetail. a

I provide tubes A, which may be seamless tubing, welded tubin 'or tubinformed of sheet metal rolled an brazed. hese tubes being split areinserted in any suitable press orformer and the split portions upset orspread to form a frame, as shown in Fig. 4. The outer ends of the arms Bfo'rmingthis frame are provided with bolt-holes b for bolting the twoadj acent frames together. Where heavy tubing inclose the differentialgearing, the forming and joining of these two frames will be all that isnecessary toprovide a very efficient casing and one which is perfectlyrigid and Without screwed or brazed joints, besides being exlines tocoincide with the lines of the frame on the main tubing and brazed orsuitably secured tothe frame on the main tubing to These tubes after isused and where it is not desired to entirely reinforce said frame, aswill be readily understood. I

Where it is desired to entirely inclose the ICC differential gearing forthe purpose of. prothe same cupped stampings or casttectil/g may heslipped over the framesand ins bo ted together, either with the samebolts that hold the frame or in any other suitable manner, and thesestampings or castings C may have reinforcing-ribs c, as'shown in sectionin Fig. 2, on. the right-hand side of the figure or may be made plane,as shown on the left-hand side of said figure.

The apertures D in Fig. 2 indicate openings for the admission of thechain where a of a journal E, as clear] chain-drive is used. Where abevel-gear drive is used, the cups C may each carry half shown in Fi 3.This ournal E is for the riving-shaft, which carries the drivingl)evi.l-gear, which in turn meshes with any suitable bcvel-gea1 mounted uponthe differential within the casing, as will be readily understood.

As clearly shown in Fig. 2, 'where the cups C are employed to inclosethe gearing should anything reguire attention within the casing, such asthe ifierential gear or the axle-bean,

ing, it is only necessary tounbolt the cups and slip them back away fromthe frames B, when the whole interior of the casing will be exposedwithout requiring the removal of the casing and its inclosed gearing andshafts from the machine and without requiring the disturbing of any ofthe adjustments of the bearings or any other parts of the. machine.

While this form of construction is particularl adapted for automobilework and more Having thus fully described my invention, I claim '1; Ingear-casing construction and in combination, tubes adapted to incloseshafts, said tubes having one end split, said split portions beingspread to form frames embracing the adjacent ends of said shafts, andmeans for securing said frames together to maintain said tubes'in properalinement, substantially as described.

2. In gear-casing, construction and in combination, tubes adapted toinclose shafts,

said tubes having one end split, said split portions being spread toform frames embracing the adjacent ends of said shafts, re-

inforcing-frames secured to said first-named frames, and means forsecuring said frames together to maintain said tubes in. properalinement, substantially as described 3. In gear-casing construction andin combination, tubes adapted to inclose shafts, said tubes having oneend split, said split portions being spread to form frames embracing theadjacent ends of said shafts, housings adapted to slip over and inclosesaid frames and provided. with an'aperture for the transmission of powertheretlrrough, and means forsecuring said frames and. housings togetherto maintain said tubes in proper alinement, substantially as described4. A gear-casing construction comprising alined tubular portions and anintermediate construction formed from said tubular portions by splittingand expanding the same.

5. A gear-casing comprising alined tubular portions having theiradjacent ends split and spread to form frames, and means to secure saidframes together.

EMMET P. GRAY.

Witnesses EDWARD PECK, EDWARD S ssDonF.

